dhcp migration issues
wiechman.lists at gmail.com
Fri Sep 4 15:41:24 UTC 2009
Note you can get an idea if the device is in use w/o arping but it takes a
little more work if you know the appropriate router the traffic should flow
to by attempting to ping the device (which will likely fail) and then look
in the routers arp table. If the device is active on the network you should
get an arp entry for it there.
> -----Original Message-----
> From: dhcp-users-bounces at lists.isc.org [mailto:dhcp-users-
> bounces at lists.isc.org] On Behalf Of Terry L. Inzauro
> Sent: Thursday, September 03, 2009 11:17 AM
> To: Users of ISC DHCP
> Subject: Re: dhcp migration issues
> McDonald, Dan wrote:
> > On Thu, 2009-09-03 at 10:52 -0500, Terry L. Inzauro wrote:
> >> Shawn Holland wrote:
> >>> On Thu, 2009-09-03 at 08:31 -0500, Terry L. Inzauro wrote:
> >> Currently this is happening:
> >> either the client never receives the DHCPOFFER or the client is
> silently disregarding the DHCPOFFER as the following entries
> >> are repeating.
> > There are some issues we've run into lately with DHCP replies being
> > silently discarded if you have Cisco IP phones in-line with
> > on certain versions of phone code and certain versions of switch code,
> > and various features enabled. Might that apply to you? Cisco bugid
> > CSCsz48108. It took us about 5 months to track it down...
> No, This device is a PC or a SOHO firewall/router.
> thank for the info though.
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